The design and performance of GRD onboard the GECAM satellite  

作　　者：Z.H.An X.L.Sun D.L.Zhang S.Yang X.Q.Li X.Y.Wen K.Gong X.H.Liang X.J.Liu Y.Q.Liu Y.G.Li S.L.Xiong Y.B.Xu Fan Zhang X.Y.Zhao C.Cai Z.Chang G.Chen C.Chen Y.Y.Du P.Y.Feng M.Gao R.Gao D.Y.Guo J.J.He D.J.Hou C.Y.Li G.Li L.Li X.F.Li M.S.Li F.J.Lu H.Lu B.Meng W.X.Peng F.Shi H.Wang J.Z.Wang Y.S.Wang H.Z.Wang X.Wen S.Xiao Y.P.Xu J.W.Yang Q.B.Yi S.N.Zhang C.Y.Zhang C.M.Zhang Fei Zhang Y.Zhao X.Zhou 

机构地区：[1]CAS,Institute of High Energy Physics,Beijing 100049,China [2]State Key Laboratory of Particle Detection and Electronics,Beijing 100049,China 3 Xiangtan University,Xiangtan 411105,China 4 Beijing Normal University,Beijing 110875,China [3]Xiangtan University,Xiangtan 411105,China [4]Beijing Normal University,Beijing 110875,China

出　　处：《Radiation Detection Technology and Methods》2022年第1期43-52,共10页辐射探测技术与方法（英文）

基　　金：This research was supported by the National Natural Science Foundation of China,Grant No.11775251;the strategic leading science and technology program of Chinese Academy of Sciences(Grant No.XDA 15360100,XDA 15360102).

摘　　要：Background Each GECAM satellite payload contains 25 gamma-ray detectors(GRDs),which can detect gamma-rays and particles and can roughly localize the Gamma-Ray Bursts(GRBs).GRD was designed using lanthanum bromide(LaBr3)crystal as the sensitive material with the rear end coupled with silicon photomultiplier(SiPM)array for readout.Purpose In aerospace engineering design of GRD,there are many key points to be studied.In this paper,we present the specific design scheme of GRD,the assembly and the performance test results of detectors.Methods Based on Monte Carlo simulation and experimental test results,the specific schematic design and assembling process of GRD were optimized.After being fully assembled,the GRDs were conducted performance tests by using radioactive source and also conducted random vibration tests.Result and conclusion The test results show that all satellite-borne GRDs have energy resolution<16%at 59.5 keV,meeting requirements of satellite in scientific performance.The random vibration test shows that GRD can maintain in a stable performance,which meets the requirement of spatial application.

关 键 词：Lanthanum bromide scintillator SiPM array GECAM Gamma-ray detector Energy resolution 

分 类 号：V474[航空宇航科学与技术—飞行器设计]